/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.feilong.lib.beanutils;

import java.io.File;
import java.lang.reflect.Array;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.net.URL;
import java.sql.Timestamp;
import java.util.Calendar;
import java.util.Collection;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.feilong.lib.beanutils.converters.ArrayConverter;
import com.feilong.lib.beanutils.converters.BigDecimalConverter;
import com.feilong.lib.beanutils.converters.BigIntegerConverter;
import com.feilong.lib.beanutils.converters.BooleanConverter;
import com.feilong.lib.beanutils.converters.ByteConverter;
import com.feilong.lib.beanutils.converters.CalendarConverter;
import com.feilong.lib.beanutils.converters.CharacterConverter;
import com.feilong.lib.beanutils.converters.ClassConverter;
import com.feilong.lib.beanutils.converters.ConverterFacade;
import com.feilong.lib.beanutils.converters.DateConverter;
import com.feilong.lib.beanutils.converters.DoubleConverter;
import com.feilong.lib.beanutils.converters.FileConverter;
import com.feilong.lib.beanutils.converters.FloatConverter;
import com.feilong.lib.beanutils.converters.IntegerConverter;
import com.feilong.lib.beanutils.converters.LongConverter;
import com.feilong.lib.beanutils.converters.ShortConverter;
import com.feilong.lib.beanutils.converters.SqlDateConverter;
import com.feilong.lib.beanutils.converters.SqlTimeConverter;
import com.feilong.lib.beanutils.converters.SqlTimestampConverter;
import com.feilong.lib.beanutils.converters.StringConverter;
import com.feilong.lib.beanutils.converters.URLConverter;

/**
 * <p>
 * Utility methods for converting String scalar values to objects of the
 * specified Class, String arrays to arrays of the specified Class. The
 * actual {@link Converter} instance to be used can be registered for each
 * possible destination Class. Unless you override them, standard
 * {@link Converter} instances are provided for all of the following
 * destination Classes:
 * </p>
 * <ul>
 * <li>java.lang.BigDecimal (no default value)</li>
 * <li>java.lang.BigInteger (no default value)</li>
 * <li>boolean and java.lang.Boolean (default to false)</li>
 * <li>byte and java.lang.Byte (default to zero)</li>
 * <li>char and java.lang.Character (default to a space)</li>
 * <li>java.lang.Class (no default value)</li>
 * <li>double and java.lang.Double (default to zero)</li>
 * <li>float and java.lang.Float (default to zero)</li>
 * <li>int and java.lang.Integer (default to zero)</li>
 * <li>long and java.lang.Long (default to zero)</li>
 * <li>short and java.lang.Short (default to zero)</li>
 * <li>java.lang.String (default to null)</li>
 * <li>java.io.File (no default value)</li>
 * <li>java.net.URL (no default value)</li>
 * <li>java.sql.Date (no default value)</li>
 * <li>java.sql.Time (no default value)</li>
 * <li>java.sql.Timestamp (no default value)</li>
 * </ul>
 *
 * <p>
 * For backwards compatibility, the standard Converters for primitive
 * types (and the corresponding wrapper classes) return a defined
 * default value when a conversion error occurs. If you prefer to have a
 * {@link ConversionException} thrown instead, replace the standard Converter
 * instances with instances created with the zero-arguments constructor. For
 * example, to cause the Converters for integers to throw an exception on
 * conversion errors, you could do this:
 * </p>
 * 
 * <pre>
 * // No-args constructor gets the version that throws exceptions
 * Converter myConverter = new org.apache.commons.beanutils.converter.IntegerConverter();
 * ConvertUtils.register(myConverter, Integer.TYPE); // Native type
 * ConvertUtils.register(myConverter, Integer.class); // Wrapper class
 * </pre>
 *
 * <p>
 * Converters generally treat null input as if it were invalid
 * input, ie they return their default value if one was specified when the
 * converter was constructed, and throw an exception otherwise. If you prefer
 * nulls to be preserved for converters that are converting to objects (not
 * primitives) then register a converter as above, passing a default value of
 * null to the converter constructor (and of course registering that converter
 * only for the .class target).
 * </p>
 *
 * <p>
 * When a converter is listed above as having no default value, then that
 * converter will throw an exception when passed null or an invalid value
 * as its input. In particular, by default the BigInteger and BigDecimal
 * converters have no default (and are therefore somewhat inconsistent
 * with the other numerical converters which all have zero as their default).
 * </p>
 *
 * <p>
 * Converters that generate <i>arrays</i> of each of the primitive types are
 * also automatically configured (including String[]). When passed null
 * or invalid input, these return an empty array (not null). See class
 * AbstractArrayConverter for the supported input formats for these converters.
 * </p>
 *
 * @version $Id$
 * @since 1.7
 */

public class ConvertUtilsBean{

    /** The Constant log. */
    private static final Logger    LOGGER = LoggerFactory.getLogger(ConvertUtilsBean.class);

    //---------------------------------------------------------------

    private static final Integer   ZERO   = new Integer(0);

    private static final Character SPACE  = new Character(' ');

    // ------------------------------------------------------- Class Methods
    /**
     * Get singleton instance
     * 
     * @return The singleton instance
     */
    protected static ConvertUtilsBean getInstance(){
        return BeanUtilsBean.getInstance().getConvertUtils();
    }

    // ------------------------------------------------------- Variables

    /**
     * The set of {@link Converter}s that can be used to convert Strings
     * into objects of a specified Class, keyed by the destination Class.
     */
    private final WeakFastHashMap<Class<?>, Converter> converters = new WeakFastHashMap<>();

    // ------------------------------------------------------- Constructors

    /** Construct a bean with standard converters registered */
    public ConvertUtilsBean(){
        converters.setFast(false);
        deregister();
        converters.setFast(true);
    }

    // --------------------------------------------------------- Public Methods

    /**
     * Convert the specified value into a String. If the specified value
     * is an array, the first element (converted to a String) will be
     * returned. The registered {@link Converter} for the
     * <code>java.lang.String</code> class will be used, which allows
     * applications to customize Object->String conversions (the default
     * implementation simply uses toString()).
     *
     * @param value
     *            Value to be converted (may be null)
     * @return The converted String value or null if value is null
     */
    public String convert(Object value){

        if (value == null){
            return null;
        }else if (value.getClass().isArray()){
            if (Array.getLength(value) < 1){
                return (null);
            }
            value = Array.get(value, 0);
            if (value == null){
                return null;
            }
            final Converter converter = lookup(String.class);
            return (converter.convert(String.class, value));
        }else{
            final Converter converter = lookup(String.class);
            return (converter.convert(String.class, value));
        }

    }

    /**
     * Convert the specified value to an object of the specified class (if
     * possible). Otherwise, return a String representation of the value.
     *
     * @param value
     *            Value to be converted (may be null)
     * @param clazz
     *            Java class to be converted to (must not be null)
     * @return The converted value
     *
     * @throws ConversionException
     *             if thrown by an underlying Converter
     */
    public Object convert(final String value,final Class<?> clazz){

        if (LOGGER.isDebugEnabled()){
            LOGGER.debug("Convert string '" + value + "' to class '" + clazz.getName() + "'");
        }
        Converter converter = lookup(clazz);
        if (converter == null){
            converter = lookup(String.class);
        }
        if (LOGGER.isTraceEnabled()){
            LOGGER.trace("  Using converter " + converter);
        }
        return (converter.convert(clazz, value));

    }

    /**
     * Convert an array of specified values to an array of objects of the
     * specified class (if possible). If the specified Java class is itself
     * an array class, this class will be the type of the returned value.
     * Otherwise, an array will be constructed whose component type is the
     * specified class.
     *
     * @param values
     *            Array of values to be converted
     * @param clazz
     *            Java array or element class to be converted to (must not be null)
     * @return The converted value
     *
     * @throws ConversionException
     *             if thrown by an underlying Converter
     */
    public Object convert(final String[] values,final Class<?> clazz){

        Class<?> type = clazz;
        if (clazz.isArray()){
            type = clazz.getComponentType();
        }
        if (LOGGER.isDebugEnabled()){
            LOGGER.debug("Convert String[" + values.length + "] to class '" + type.getName() + "[]'");
        }
        Converter converter = lookup(type);
        if (converter == null){
            converter = lookup(String.class);
        }
        if (LOGGER.isTraceEnabled()){
            LOGGER.trace("  Using converter " + converter);
        }
        final Object array = Array.newInstance(type, values.length);
        for (int i = 0; i < values.length; i++){
            Array.set(array, i, converter.convert(type, values[i]));
        }
        return (array);

    }

    /**
     * Convert the value to an object of the specified class (if
     * possible). If no converter for the desired target type is registered,
     * the passed in object is returned unchanged.
     *
     * @param value
     *            Value to be converted (may be null)
     * @param targetType
     *            Class of the value to be converted to (must not be null)
     * @return The converted value
     *
     * @throws ConversionException
     *             if thrown by an underlying Converter
     */
    public Object convert(final Object value,final Class<?> targetType){

        final Class<?> sourceType = value == null ? null : value.getClass();

        if (LOGGER.isDebugEnabled()){
            if (value == null){
                LOGGER.debug("Convert null value to type '" + targetType.getName() + "'");
            }else{
                LOGGER.debug("Convert type '" + sourceType.getName() + "' value '" + value + "' to type '" + targetType.getName() + "'");
            }
        }

        Object converted = value;
        Converter converter = lookup(sourceType, targetType);
        if (converter != null){
            if (LOGGER.isTraceEnabled()){
                LOGGER.trace("  Using converter " + converter);
            }
            converted = converter.convert(targetType, value);
        }
        if (String.class.equals(targetType) && converted != null && !(converted instanceof String)){

            // NOTE: For backwards compatibility, if the Converter
            //       doesn't handle  conversion-->String then
            //       use the registered String Converter
            converter = lookup(String.class);
            if (converter != null){
                if (LOGGER.isTraceEnabled()){
                    LOGGER.trace("  Using converter " + converter);
                }
                converted = converter.convert(String.class, converted);
            }

            // If the object still isn't a String, use toString() method
            if (converted != null && !(converted instanceof String)){
                converted = converted.toString();
            }

        }
        return converted;

    }

    /**
     * Remove all registered {@link Converter}s, and re-establish the
     * standard Converters.
     */
    public void deregister(){

        converters.clear();

        registerPrimitives(false);
        registerStandard(false, false);
        registerOther(true);
        registerArrays(false, 0);
        register(BigDecimal.class, new BigDecimalConverter());
        register(BigInteger.class, new BigIntegerConverter());
    }

    /**
     * Register the provided converters with the specified defaults.
     *
     * @param throwException
     *            <code>true</code> if the converters should
     *            throw an exception when a conversion error occurs, otherwise
     *            <code>false</code> if a default value should be used.
     * @param defaultNull
     *            <code>true</code>if the <i>standard</i> converters
     *            (see {@link ConvertUtilsBean#registerStandard(boolean, boolean)})
     *            should use a default value of <code>null</code>, otherwise <code>false</code>.
     *            N.B. This values is ignored if <code>throwException</code> is <code>true</code>
     * @param defaultArraySize
     *            The size of the default array value for array converters
     *            (N.B. This values is ignored if <code>throwException</code> is <code>true</code>).
     *            Specifying a value less than zero causes a <code>null</code> value to be used for
     *            the default.
     */
    public void register(final boolean throwException,final boolean defaultNull,final int defaultArraySize){
        registerPrimitives(throwException);
        registerStandard(throwException, defaultNull);
        registerOther(throwException);
        registerArrays(throwException, defaultArraySize);
    }

    /**
     * Register the converters for primitive types.
     * </p>
     * This method registers the following converters:
     * <ul>
     * <li><code>Boolean.TYPE</code> - {@link BooleanConverter}</li>
     * <li><code>Byte.TYPE</code> - {@link ByteConverter}</li>
     * <li><code>Character.TYPE</code> - {@link CharacterConverter}</li>
     * <li><code>Double.TYPE</code> - {@link DoubleConverter}</li>
     * <li><code>Float.TYPE</code> - {@link FloatConverter}</li>
     * <li><code>Integer.TYPE</code> - {@link IntegerConverter}</li>
     * <li><code>Long.TYPE</code> - {@link LongConverter}</li>
     * <li><code>Short.TYPE</code> - {@link ShortConverter}</li>
     * </ul>
     * 
     * @param throwException
     *            <code>true</code> if the converters should
     *            throw an exception when a conversion error occurs, otherwise <code>
     * <code>false</code> if a default value should be used.
     */
    private void registerPrimitives(final boolean throwException){
        register(Boolean.TYPE, throwException ? new BooleanConverter() : new BooleanConverter(Boolean.FALSE));
        register(Byte.TYPE, throwException ? new ByteConverter() : new ByteConverter(ZERO));
        register(Character.TYPE, throwException ? new CharacterConverter() : new CharacterConverter(SPACE));
        register(Double.TYPE, throwException ? new DoubleConverter() : new DoubleConverter(ZERO));
        register(Float.TYPE, throwException ? new FloatConverter() : new FloatConverter(ZERO));
        register(Integer.TYPE, throwException ? new IntegerConverter() : new IntegerConverter(ZERO));
        register(Long.TYPE, throwException ? new LongConverter() : new LongConverter(ZERO));
        register(Short.TYPE, throwException ? new ShortConverter() : new ShortConverter(ZERO));
    }

    /**
     * Register the converters for standard types.
     * </p>
     * This method registers the following converters:
     * <ul>
     * <li><code>BigDecimal.class</code> - {@link BigDecimalConverter}</li>
     * <li><code>BigInteger.class</code> - {@link BigIntegerConverter}</li>
     * <li><code>Boolean.class</code> - {@link BooleanConverter}</li>
     * <li><code>Byte.class</code> - {@link ByteConverter}</li>
     * <li><code>Character.class</code> - {@link CharacterConverter}</li>
     * <li><code>Double.class</code> - {@link DoubleConverter}</li>
     * <li><code>Float.class</code> - {@link FloatConverter}</li>
     * <li><code>Integer.class</code> - {@link IntegerConverter}</li>
     * <li><code>Long.class</code> - {@link LongConverter}</li>
     * <li><code>Short.class</code> - {@link ShortConverter}</li>
     * <li><code>String.class</code> - {@link StringConverter}</li>
     * </ul>
     * 
     * @param throwException
     *            <code>true</code> if the converters should
     *            throw an exception when a conversion error occurs, otherwise <code>
     * <code>false</code> if a default value should be used.
     * @param defaultNull
     *            <code>true</code>if the <i>standard</i> converters
     *            (see {@link ConvertUtilsBean#registerStandard(boolean, boolean)})
     *            should use a default value of <code>null</code>, otherwise <code>false</code>.
     *            N.B. This values is ignored if <code>throwException</code> is <code>true</code>
     */
    private void registerStandard(final boolean throwException,final boolean defaultNull){

        final Number defaultNumber = defaultNull ? null : ZERO;
        final BigDecimal bigDecDeflt = defaultNull ? null : new BigDecimal("0.0");
        final BigInteger bigIntDeflt = defaultNull ? null : new BigInteger("0");
        final Boolean booleanDefault = defaultNull ? null : Boolean.FALSE;
        final Character charDefault = defaultNull ? null : SPACE;
        final String stringDefault = defaultNull ? null : "";

        register(BigDecimal.class, throwException ? new BigDecimalConverter() : new BigDecimalConverter(bigDecDeflt));
        register(BigInteger.class, throwException ? new BigIntegerConverter() : new BigIntegerConverter(bigIntDeflt));
        register(Boolean.class, throwException ? new BooleanConverter() : new BooleanConverter(booleanDefault));
        register(Byte.class, throwException ? new ByteConverter() : new ByteConverter(defaultNumber));
        register(Character.class, throwException ? new CharacterConverter() : new CharacterConverter(charDefault));
        register(Double.class, throwException ? new DoubleConverter() : new DoubleConverter(defaultNumber));
        register(Float.class, throwException ? new FloatConverter() : new FloatConverter(defaultNumber));
        register(Integer.class, throwException ? new IntegerConverter() : new IntegerConverter(defaultNumber));
        register(Long.class, throwException ? new LongConverter() : new LongConverter(defaultNumber));
        register(Short.class, throwException ? new ShortConverter() : new ShortConverter(defaultNumber));
        register(String.class, throwException ? new StringConverter() : new StringConverter(stringDefault));

    }

    /**
     * Register the converters for other types.
     * </p>
     * This method registers the following converters:
     * <ul>
     * <li><code>Class.class</code> - {@link ClassConverter}</li>
     * <li><code>java.util.Date.class</code> - {@link DateConverter}</li>
     * <li><code>java.util.Calendar.class</code> - {@link CalendarConverter}</li>
     * <li><code>File.class</code> - {@link FileConverter}</li>
     * <li><code>java.sql.Date.class</code> - {@link SqlDateConverter}</li>
     * <li><code>java.sql.Time.class</code> - {@link SqlTimeConverter}</li>
     * <li><code>java.sql.Timestamp.class</code> - {@link SqlTimestampConverter}</li>
     * <li><code>URL.class</code> - {@link URLConverter}</li>
     * </ul>
     * 
     * @param throwException
     *            <code>true</code> if the converters should
     *            throw an exception when a conversion error occurs, otherwise <code>
     * <code>false</code> if a default value should be used.
     */
    private void registerOther(final boolean throwException){
        register(Class.class, throwException ? new ClassConverter() : new ClassConverter(null));
        register(java.util.Date.class, throwException ? new DateConverter() : new DateConverter(null));
        register(Calendar.class, throwException ? new CalendarConverter() : new CalendarConverter(null));
        register(File.class, throwException ? new FileConverter() : new FileConverter(null));
        register(java.sql.Date.class, throwException ? new SqlDateConverter() : new SqlDateConverter(null));
        register(java.sql.Time.class, throwException ? new SqlTimeConverter() : new SqlTimeConverter(null));
        register(Timestamp.class, throwException ? new SqlTimestampConverter() : new SqlTimestampConverter(null));
        register(URL.class, throwException ? new URLConverter() : new URLConverter(null));
    }

    /**
     * Register array converters.
     *
     * @param throwException
     *            <code>true</code> if the converters should
     *            throw an exception when a conversion error occurs, otherwise <code>
     * <code>false</code> if a default value should be used.
     * @param defaultArraySize
     *            The size of the default array value for array converters
     *            (N.B. This values is ignored if <code>throwException</code> is <code>true</code>).
     *            Specifying a value less than zero causes a <code>null<code> value to be used for
     *            the default.
     */
    private void registerArrays(final boolean throwException,final int defaultArraySize){

        // Primitives
        registerArrayConverter(Boolean.TYPE, new BooleanConverter(), throwException, defaultArraySize);
        registerArrayConverter(Byte.TYPE, new ByteConverter(), throwException, defaultArraySize);
        registerArrayConverter(Character.TYPE, new CharacterConverter(), throwException, defaultArraySize);
        registerArrayConverter(Double.TYPE, new DoubleConverter(), throwException, defaultArraySize);
        registerArrayConverter(Float.TYPE, new FloatConverter(), throwException, defaultArraySize);
        registerArrayConverter(Integer.TYPE, new IntegerConverter(), throwException, defaultArraySize);
        registerArrayConverter(Long.TYPE, new LongConverter(), throwException, defaultArraySize);
        registerArrayConverter(Short.TYPE, new ShortConverter(), throwException, defaultArraySize);

        // Standard
        registerArrayConverter(BigDecimal.class, new BigDecimalConverter(), throwException, defaultArraySize);
        registerArrayConverter(BigInteger.class, new BigIntegerConverter(), throwException, defaultArraySize);
        registerArrayConverter(Boolean.class, new BooleanConverter(), throwException, defaultArraySize);
        registerArrayConverter(Byte.class, new ByteConverter(), throwException, defaultArraySize);
        registerArrayConverter(Character.class, new CharacterConverter(), throwException, defaultArraySize);
        registerArrayConverter(Double.class, new DoubleConverter(), throwException, defaultArraySize);
        registerArrayConverter(Float.class, new FloatConverter(), throwException, defaultArraySize);
        registerArrayConverter(Integer.class, new IntegerConverter(), throwException, defaultArraySize);
        registerArrayConverter(Long.class, new LongConverter(), throwException, defaultArraySize);
        registerArrayConverter(Short.class, new ShortConverter(), throwException, defaultArraySize);
        registerArrayConverter(String.class, new StringConverter(), throwException, defaultArraySize);

        // Other
        registerArrayConverter(Class.class, new ClassConverter(), throwException, defaultArraySize);
        registerArrayConverter(java.util.Date.class, new DateConverter(), throwException, defaultArraySize);
        registerArrayConverter(Calendar.class, new DateConverter(), throwException, defaultArraySize);
        registerArrayConverter(File.class, new FileConverter(), throwException, defaultArraySize);
        registerArrayConverter(java.sql.Date.class, new SqlDateConverter(), throwException, defaultArraySize);
        registerArrayConverter(java.sql.Time.class, new SqlTimeConverter(), throwException, defaultArraySize);
        registerArrayConverter(Timestamp.class, new SqlTimestampConverter(), throwException, defaultArraySize);
        registerArrayConverter(URL.class, new URLConverter(), throwException, defaultArraySize);

    }

    /**
     * Register a new ArrayConverter with the specified element delegate converter
     * that returns a default array of the specified size in the event of conversion errors.
     *
     * @param componentType
     *            The component type of the array
     * @param componentConverter
     *            The converter to delegate to for the array elements
     * @param throwException
     *            Whether a conversion exception should be thrown or a default
     *            value used in the event of a conversion error
     * @param defaultArraySize
     *            The size of the default array
     */
    private void registerArrayConverter(
                    final Class<?> componentType,
                    final Converter componentConverter,
                    final boolean throwException,
                    final int defaultArraySize){
        final Class<?> arrayType = Array.newInstance(componentType, 0).getClass();
        Converter arrayConverter = null;
        if (throwException){
            arrayConverter = new ArrayConverter(arrayType, componentConverter);
        }else{
            arrayConverter = new ArrayConverter(arrayType, componentConverter, defaultArraySize);
        }
        register(arrayType, arrayConverter);
    }

    /** strictly for convenience since it has same parameter order as Map.put */
    private void register(final Class<?> clazz,final Converter converter){
        register(new ConverterFacade(converter), clazz);
    }

    /**
     * Remove any registered {@link Converter} for the specified destination
     * <code>Class</code>.
     *
     * @param clazz
     *            Class for which to remove a registered Converter
     */
    public void deregister(final Class<?> clazz){

        converters.remove(clazz);

    }

    /**
     * Look up and return any registered {@link Converter} for the specified
     * destination class; if there is no registered Converter, return
     * <code>null</code>.
     *
     * @param clazz
     *            Class for which to return a registered Converter
     * @return The registered {@link Converter} or <code>null</code> if not found
     */
    public Converter lookup(final Class<?> clazz){

        return (converters.get(clazz));

    }

    /**
     * Look up and return any registered {@link Converter} for the specified
     * source and destination class; if there is no registered Converter,
     * return <code>null</code>.
     *
     * @param sourceType
     *            Class of the value being converted
     * @param targetType
     *            Class of the value to be converted to
     * @return The registered {@link Converter} or <code>null</code> if not found
     */
    public Converter lookup(final Class<?> sourceType,final Class<?> targetType){

        if (targetType == null){
            throw new IllegalArgumentException("Target type is missing");
        }
        if (sourceType == null){
            return lookup(targetType);
        }

        Converter converter = null;
        // Convert --> String
        if (targetType == String.class){
            converter = lookup(sourceType);
            if (converter == null && (sourceType.isArray() || Collection.class.isAssignableFrom(sourceType))){
                converter = lookup(String[].class);
            }
            if (converter == null){
                converter = lookup(String.class);
            }
            return converter;
        }

        // Convert --> String array
        if (targetType == String[].class){
            if (sourceType.isArray() || Collection.class.isAssignableFrom(sourceType)){
                converter = lookup(sourceType);
            }
            if (converter == null){
                converter = lookup(String[].class);
            }
            return converter;
        }

        return lookup(targetType);

    }

    /**
     * Register a custom {@link Converter} for the specified destination
     * <code>Class</code>, replacing any previously registered Converter.
     *
     * @param converter
     *            Converter to be registered
     * @param clazz
     *            Destination class for conversions performed by this
     *            Converter
     */
    public void register(final Converter converter,final Class<?> clazz){

        converters.put(clazz, converter);

    }
}
